package com.portal.framework.util;

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.net.URLDecoder;
	   /**
     * <p>Title:字符编码工具类 </p>
     * <p>Description:  </p>
     * <p>Copyright: flashman.com.cn Copyright (c) 2005</p>
     * <p>Company: flashman.com.cn </p>
     * @author: jeffzhu
     * @version 1.0
     */
     public class CharTools {
     /**
     * 转换编码 ISO-8859-1到GB2312
     * @param text
     * @return
     */
     public String ISO2GB(String text) {
     String result = "";
     try {
     result = new String(text.getBytes("ISO-8859-1"), "GB2312");
     }
     catch (UnsupportedEncodingException ex) {
     result = ex.toString();
     }
     return result;
     }
     /**
     * 转换编码 GB2312到ISO-8859-1
     * @param text
     * @return
     */
     public String GB2ISO(String text) {
     String result = "";
     try {
     result = new String(text.getBytes("GB2312"), "ISO-8859-1");
     }
     catch (UnsupportedEncodingException ex) {
     ex.printStackTrace();
     }
     return result;
     }
     /**
     * Utf8URL编码
     * @param s
     * @return
     */
     public String Utf8URLencode(String text) {
     StringBuffer result = new StringBuffer();
     for (int i = 0; i < text.length(); i++) {
     char c = text.charAt(i);
     if (c >= 0 && c <= 255) {
     result.append(c);
     }else {
     byte[] b = new byte[0];
     try {
     b = Character.toString(c).getBytes("UTF-8");
     }catch (Exception ex) {
     }
     for (int j = 0; j < b.length; j++) {
     int k = b[j];
     if (k < 0) k += 256;
     result.append("%" + Integer.toHexString(k).toUpperCase());
     }
     }
     }
     return result.toString();
     }
     /**
     * Utf8URL解码
     * @param text
     * @return
     */
     public String Utf8URLdecode(String text) {
     String result = "";
     int p = 0;
     if (text!=null && text.length()>0){
     text = text.toLowerCase();
     p = text.indexOf("%e");
     if (p == -1) return text;
     while (p != -1) {
     result += text.substring(0, p);
     text = text.substring(p, text.length());
     if (text == "" || text.length() < 9) return result;
     result += CodeToWord(text.substring(0, 9));
     text = text.substring(9, text.length());
     p = text.indexOf("%e");
     }
     }
     return result + text;
     }
     /**
     * utf8URL编码转字符
     * @param text
     * @return
     */
     private String CodeToWord(String text) {
     String result;
     if (Utf8codeCheck(text)) {
     byte[] code = new byte[3];
     code[0] = (byte) (Integer.parseInt(text.substring(1, 3), 16) - 256);
     code[1] = (byte) (Integer.parseInt(text.substring(4, 6), 16) - 256);
     code[2] = (byte) (Integer.parseInt(text.substring(7, 9), 16) - 256);
     try {
     result = new String(code, "UTF-8");
     }catch (UnsupportedEncodingException ex) {
     result = null;
     }
     }
     else {
     result = text;
     }
     return result;
     }
     /**
     * 编码是否有效
     * @param text
     * @return
     */
     private boolean Utf8codeCheck(String text){
     String sign = "";
     if (text.startsWith("%e"))
     for (int i = 0, p = 0; p != -1; i++) {
     p = text.indexOf("%", p);
     if (p != -1)
     p++;
     sign += p;
     }
     return sign.equals("147-1");
     }
     /**
     * 是否Utf8Url编码
     * @param text
     * @return
     */
     public boolean isUtf8Url(String text) {
     text = text.toLowerCase();
     int p = text.indexOf("%");
     if (p != -1 && text.length() - p > 9) {
     text = text.substring(p, p + 9);
     }
     return Utf8codeCheck(text);
     }
     /**
     * 测试
     * @param args
     */

     public static void main(String[] args) {
     CharTools charTools = new CharTools();
     
     String text="http://www.baidu.com/baidu?word=中国大百科在线全文检索&tn=myie2dg";
//     String a=URLDecoder.decode(text);
//     String b=charTools.Utf8URLencode("大哥");
     String c=charTools.Utf8URLdecode("%E4%B8%AD%E5%9B%BD%E5%B7%A1%E5%9B%9E%E6%BC%94%E5%94%B1%EF%BF%BD%3F%E4%B8%8A%E6%B5%B7");
//     System.out.println(a);
//       System.out.println(b);
     System.out.println(c);
//     String url;
//     url = "http://www.google.com/search?hl=zh-CN&newwindow=1&q=%E4%B8%AD%E5%9B%BD%E5%A4%A7%E7%99%BE%E7%A7%91%E5%9C%A8%E7%BA%BF%E5%85%A8%E6%96%87%E6%A3%80%E7%B4%A2&btnG=%E6%90%9C%E7%B4%A2&lr=";
//     if(charTools.isUtf8Url(url)){
//     System.out.println(charTools.Utf8URLdecode(url));
//     }else{
//     System.out.println(URLDecoder.decode(url));
//     }
//     url = "http://www.baidu.com/baidu?word=%D6%D0%B9%FA%B4%F3%B0%D9%BF%C6%D4%DA%CF%DF%C8%AB%CE%C4%BC%EC%CB%F7&tn=myie2dg";
//     if(charTools.isUtf8Url(url)){
//     System.out.println(charTools.Utf8URLdecode(url));
//     }else{
//     System.out.println(URLDecoder.decode(url));
//     }
     }
}
	